[PATCH 1/3] sched: rt: account the cpu time during the tick

Peter Zijlstra
2007-12-18T18:20:44Z

[-- Attachment #1: sched-rt-update.patch --]
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Realtime tasks would not account their runtime during ticks. Which would lead
to:

struct sched_param param = { .sched_priority = 10 };
pthread_setschedparam(pthread_self(), SCHED_FIFO, &param);

while (1) ;

Not showing up in top.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
kernel/sched_rt.c | 2 ++
1 file changed, 2 insertions(+)

Index: linux-2.6/kernel/sched_rt.c
===================================================================
--- linux-2.6.orig/kernel/sched_rt.c
+++ linux-2.6/kernel/sched_rt.c
@@ -837,6 +837,8 @@ static void prio_changed_rt(struct rq *r

static void task_tick_rt(struct rq *rq, struct task_struct *p)
{
+ update_curr_rt(rq);
+
/*
* RR tasks need a special form of timeslice management.
* FIFO tasks have no timeslices.

--